libthread: add threadmaybackground

Programs that want to background themselves now need
to define threadmaybackground returning 1.
This avoids a confusing (to people and debuggers)
extra parent process for all the threaded programs
that will never want to background themselves.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib9p/ramfs.c b/src/lib9p/ramfs.c
index b7a07c7d..7cf6489d 100644
--- a/src/lib9p/ramfs.c
+++ b/src/lib9p/ramfs.c
@@ -125,6 +125,12 @@ usage(void)
 	threadexitsall("usage");
 }
 
+int
+threadmaybackground(void)
+{
+	return 1;
+}
+
 void
 threadmain(int argc, char **argv)
 {